1 1. Taking force, length and time to be
fundamental quantities find the dimensional formula for mass, momentum,
Universal Gravitational constant and density.
2. Is dimensionally correct equation necessarily be acorrect physical relation? Justify your relation.
3. Name any three physical quantities which have same dimensions.
4. Can a quantity have unit but no dimension? Explain.
5. What is the difference between accurate and precise measurement ?It is the two different concept precision of a measurement means how.
6. Two bodies made of the same material have the same external dimensions and appearance, but one is solid and the other is hollow. When they are heated, is the overall volume expansion the same or different?
7. Metal knob of door is colder than wooden parts at the same temperature. Why?
8. Water level initially falls in a vessel when it is heated. Why?
9. Why is it sometimes possible to loosen caps of screw top bottles by dipping the cap briefly in hot water?
10. Why do frozen pipe brusts?
11. Explain why a column of mercury in thermometer first descends slightly and then rises when placed in hot water?
12. Does the coefficient of linear expansion depend on length? Explain.
13. Why is mercury used commonly as a thermometric substance? Give two reasons.
14. What are the differences between heat and temperature?
15.At what point of thermometric scale does Kelvin scale reading coincide with Fahrenheit scale reading?
2. Is dimensionally correct equation necessarily be acorrect physical relation? Justify your relation.
3. Name any three physical quantities which have same dimensions.
4. Can a quantity have unit but no dimension? Explain.
5. What is the difference between accurate and precise measurement ?It is the two different concept precision of a measurement means how.
6. Two bodies made of the same material have the same external dimensions and appearance, but one is solid and the other is hollow. When they are heated, is the overall volume expansion the same or different?
7. Metal knob of door is colder than wooden parts at the same temperature. Why?
8. Water level initially falls in a vessel when it is heated. Why?
9. Why is it sometimes possible to loosen caps of screw top bottles by dipping the cap briefly in hot water?
10. Why do frozen pipe brusts?
11. Explain why a column of mercury in thermometer first descends slightly and then rises when placed in hot water?
12. Does the coefficient of linear expansion depend on length? Explain.
13. Why is mercury used commonly as a thermometric substance? Give two reasons.
14. What are the differences between heat and temperature?
15.At what point of thermometric scale does Kelvin scale reading coincide with Fahrenheit scale reading?
1 16. How can you charge a body by method of induction?
17. write some properties of charge.
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